Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

142
FXUS63 KLOT 281126
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
626 AM CDT Thu May 28 2026

.KEY MESSAGES...

- Generally warm and dry weather is expected through early next
  week.

- Daily lake breezes will keep temperatures cooler near the lake
  with backdoor fronts leading to cooler conditions farther
  inland today and again Saturday.

- Dangerous swimming conditions are expected to develop at area
  beaches this morning and continue into this evening.

&&

.DISCUSSION...
Issued at 310 AM CDT Thu May 28 2026

A backdoor front diving down southern Lake Michigan early this
morning will lead to quickly building waves and the development
of dangerous currents at area beaches this morning. A Beach
Hazards Statement remains in effect through this evening to
account for this. Onshore winds will keep temperatures cooler
across the Chicago metro today (60s along the lakeshore and 70s
inland), with 80s possible mainly west of I-39 and south of the
Kankakee River.

Meanwhile, a mid-upper level Omega Blocking pattern is taking
shape across the CONUS this morning, with high amplitude ridging
across the central CONUS and Canada centered between a broad
closed low over California and another over southeastern Canada.
This will lead to continued warm (highs in the 80s) and dry
conditions for the majority of the area for the next several
days as an expansive surface high also takes hold across the
region. Given the light surface flow, daily lake breezes and
onshore winds will keep temperatures cooler (60s to around 70)
near the lakeshore. A surface low forecast to dive southeast
out of Canada into New England late Friday could swing another
backdoor front across the area into Saturday and accordingly
lead to cooler conditions extending much farther inland,
similar to today.

A narrow ribbon of higher low-level moisture will extend from
the Gulf north across the Central Plains into next week. The
very dry airmass here locally should keep this axis well to our
west, though a few showers may brush far western Illinois along
the Mississippi River at times. The blocking pattern eventually
begins to break down toward mid to late next week which could
lead to precipitation chances returning to the region.

Petr

&&

.AVIATION /12Z TAFS THROUGH 18Z FRIDAY/...
Issued at 626 AM CDT Thu May 28 2026

Dry and VFR conditions are forecast through the TAF window.
Winds will remain out of the northeast through today with
occasional gusts up to 20 knots. Winds are expected to diminish
after 00Z, becoming light and variable. After sunrise tomorrow,
winds will remain light but turn to the south-southeast.

DK

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Beach Hazards Statement through this evening for ILZ006-ILZ103-
     ILZ104.

IN...Beach Hazards Statement through this evening for INZ001-INZ002.

LM...Small Craft Advisory until 7 PM CDT this evening for the IL
     and IN nearshore waters.

&&

$$

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